Not all threads are blocked by blocking system calls.
在调用阻塞的系统调用之时不会阻塞全部的线程。
The synchronous blocking system is installed on the landing stage capable of moving in electromagnetic tracks.
同步拦降系统安装在可以在电磁轨道上运行的起降台上。
Whenever a user-level thread makes a blocking system call, the kernel execution vehicle it is using will become blocked in the kernel.
当用户空间线程调用了一个阻塞的系统调用时,内核执行对象也会在内核阻塞。
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